Re: [GCC 4.8 wwwdocs] PATCH: Mention several user-visible changes for x86

[Igor Zamyatin <izamyatin@gmail.com>]

Gerald,

Is it ok for wwwdocs?

Thanks,
Igor

On Wed, Feb 13, 2013 at 3:21 PM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On Wed, Feb 13, 2013 at 12:17 PM, Igor Zamyatin <izamyatin@gmail.com> wrote:
>>>
>>> Please also mention new -mfxsr, -mxsave and -mxsaveopt options.
>>>
>>>>       <li> New built-in functions to detect run-time CPU type and ISA:
>>>>       <ul>
>>>>         <li>A built-in function <code>__builtin_cpu_is</code> has been added to
>>>> ***************
>>>> *** 524,529 ****
>>>> --- 530,538 ----
>>>>       <a href="http://gcc.gnu.org/wiki/FunctionMultiVersioning">wiki</a>
>>>> for more
>>>>       information.
>>>>       </li>
>>>> +     <li> Problem with instability of pre-reload scheduler on x86
>>>> targets was fixed. Now option -fschedule-insn
>>>> +     can be used loosely to reach better performance.
>>>
>>> "used loosely" in what sense?
>>>
>>> Thanks,
>>> Uros.
>>
>> Updated version. Does it look ok?
>
> Looks OK to me. I have CC'd Gerald for a grammar and style check.
>
> Thanks,
> Uros.
>
>>
>>
>> Thanks,
>> Igor
>>
 Index: htdocs/gcc-4.8/changes.html
 ===================================================================
 RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.8/changes.html,v
 retrieving revision 1.95
 diff -c -r1.95 changes.html
 *** htdocs/gcc-4.8/changes.html 11 Feb 2013 15:12:58 -0000      1.95
 --- htdocs/gcc-4.8/changes.html 12 Feb 2013 15:10:41 -0000
 ***************
 *** 460,465 ****
 --- 460,471 ----
       wrong results.  You must build all
       modules with <code>-mpreferred-stack-boundary=3</code>, including any
       libraries.  This includes the system libraries and startup modules.</li>
 +     <li>Support for the new Intel processor codename Broadwell with RDSEED,
 +     ADCX, ADOX, PREFETCHW is available through <code>-madx</code>,
 +     <code>-mprfchw</code>, <code>-mrdseed</code>.
 +     </li>
 +     <li> Support for Intel RTM and HLE intrinsics, built-in
 functions and code generation is available via <code>-mrtm</code> and
 <code>-mhle</code>.
 +     </li>
 +     <li> Support for Intel FXSR, XSAVE and XSAVEOPT instruction
sets. Intrinsics and built-in functions are available
 +     via <code>-mfxsr</code>, <code>-mxsave</code> and
<code>-mxsaveopt</code> respectively.
 +     </li>
       <li> New built-in functions to detect run-time CPU type and ISA:
       <ul>
         <li>A built-in function <code>__builtin_cpu_is</code> has been added to
 ***************
 *** 524,529 ****
 --- 530,538 ----
       <a href="http://gcc.gnu.org/wiki/FunctionMultiVersioning">wiki</a>
 for more
       information.
       </li>
 +     <li> x86 backend was improved to allow option
<code>-fscedule-insns</code> to work reliably.
 +     This option can be used to schedule instructions better and can
lead to improved performace in certain cases.
 +     </li>
       <li> Windows MinGW-w64 targets (<code>*-w64-mingw*</code>)
 require at least r5437 from the Mingw-w64 trunk. </li>
     </ul>